We have it, don't be concerned about it at all. It's just the natural expansion, contraction and flexibility of the trailer's panels caused by temperature changes and slight flexing of the frame as you walk about.
You can snug the stabilizers or add x-chock stabilizers between the tires, may help. But the panels will still expand, contract and move, and probably make thunder. Ours do.
Doug and Cheryl
2012 FC RB, Michelin 16, ProPride 1400
2016 Ram 1500 Laramie Crew Cab 4X4 Ecodiesel 3.92 axles
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